** Description changed:
- I have a test Ceph cluster as an object storage with both Swift and S3
- protocols enabled for Glance (Ussuri). When I use Swift backend with
- Glance, an image upload completes quickly enough. But with S3 backend
- Glance, it takes much more time to upload an image and it seems to rise
- exponentially.
+ [Impact]
+ [Test Case]
+ I have a test Ceph cluster as an object storage with both Swift and S3
protocols enabled for Glance (Ussuri). When I use Swift backend with Glance, an
image upload completes quickly enough. But with S3 backend Glance, it takes
much more time to upload an image and it seems to rise exponentially.
It's worth noting that when uploading an image with S3 backend, a single
core is consumed 100% by glance-api process.
for backend in swift s3; do
- for i in {8,16,32,64,128,512}; do
- dd if=/dev/zero of=my-image.img bs=1M count=$i oflag=sync
- time glance image-create \
- --store $backend \
- --file my-image.img --name my-image \
- --disk-format raw --container-format bare \
- --progress
- done
+ for i in {8,16,32,64,128,512}; do
+ dd if=/dev/zero of=my-image.img bs=1M count=$i oflag=sync
+ time glance image-create \
+ --store $backend \
+ --file my-image.img --name my-image \
+ --disk-format raw --container-format bare \
+ --progress
+ done
done
[swift]
8MB - 2.4s
16MB - 2.8s
32MB - 2.6s
64MB - 2.7s
128MB - 3.1s
...
512MB - 5.9s
[s3]
8MB - 2.2s
16MB - 2.9s
32MB - 5.5s
64MB - 16.3s
128MB - 54.9s
...
512MB - 14m26s
Btw, downloading of 512MB image with S3 backend can complete with less
than 10 seconds.
$ time openstack image save --file downloaded.img
917c5424-4350-4bc5-98ca-66d40e101843
real 0m5.673s
- $ du -h downloaded.img
+ $ du -h downloaded.img
512M downloaded.img
-
[/etc/glance/glance-api.conf]
enabled_backends = local:file, ceph:rbd, swift:swift, s3:s3
[swift]
auth_version = 3
auth_address = http://192.168.151.131:5000/v3
...
container = glance
large_object_size = 5120
large_object_chunk_size = 200
-
[s3]
s3_store_host = http://192.168.151.137:80/
...
s3_store_bucket = zaza-glance-s3-test
s3_store_large_object_size = 5120
s3_store_large_object_chunk_size = 200
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: python3-glance-store 2.0.0-0ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-77.86-generic 5.4.119
Uname: Linux 5.4.0-77-generic x86_64
NonfreeKernelModules: bluetooth ecdh_generic ecc tcp_diag inet_diag
binfmt_misc veth zfs zunicode zlua zavl icp zcommon znvpair spl unix_diag
nft_masq nft_chain_nat bridge stp llc vhost_vsock
vmw_vsock_virtio_transport_common vhost vsock ebtable_filter ebtables
ip6table_raw ip6table_mangle ip6table_nat ip6table_filter ip6_tables
iptable_raw iptable_mangle iptable_nat nf_nat nf_conntrack nf_defrag_ipv6
nf_defrag_ipv4 iptable_filter bpfilter nf_tables nfnetlink dm_multipath
scsi_dh_rdac scsi_dh_emc scsi_dh_alua kvm_amd ccp input_leds kvm joydev mac_hid
serio_raw qemu_fw_cfg sch_fq_codel ip_tables x_tables autofs4 btrfs
zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor
async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear crct10dif_pclmul
crc32_pclmul cirrus ghash_clmulni_intel drm_kms_helper virtio_net syscopyarea
aesni_intel sysfillrect sysimgblt fb_sys_fops crypto_simd cryptd drm virtio_blk
glue_helper net_failover psmouse failover floppy i2c_piix4 pata_acpi
ApportVersion: 2.20.11-0ubuntu27.18
Architecture: amd64
CasperMD5CheckResult: skip
Date: Wed Jul 7 04:46:05 2021
PackageArchitecture: all
ProcEnviron:
- TERM=screen-256color
- PATH=(custom, no user)
- LANG=C.UTF-8
- SHELL=/bin/bash
+ TERM=screen-256color
+ PATH=(custom, no user)
+ LANG=C.UTF-8
+ SHELL=/bin/bash
SourcePackage: python-glance-store
UpgradeStatus: No upgrade log present (probably fresh install)
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https://bugs.launchpad.net/bugs/1934849
Title:
s3 backend takes time exponentially
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